First Edition of this important book full title : Six Years: The dematerialization of the art object from 1966 to 1972: a cross-reference book of information on some esthetic boundaries: consisting of a bibliography into which are inserted a fragmented text, art works, documents, interviews, and sumposia, arranged chronologically and focused on so-called conceptual or information or idea art with mentions of such vaguely designed areas as minimal, anti-form, systems, earth, or process art, occurring now in the Americas, Europe, England, Australia and Asia 9with occasional political overtones), edited and annotated by Lucy R Lippard. This says it all, 272 pp detailed texts, many b/w images in orignal red linen covers with original dustjacked, this copy is in very good condition.